No fields are created using entities. All fields are created by the Captain himself from the energy of the zero point. Zero point = infinite neutral energy source
Health fields are based on scientific data. There are a lot of them to list them in one post. Take a look at the channel “Sapien Medicine”.
I will once again advise you to read this post, it describes the basic idea of creating a field. As far as it is possible to do:
All the answers are already in the Captain’s message